<!DOCTYPE html>
<body>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="css/bootstrap.min.css">
    <style>
        body{
            background-color: #0f0f0f;
        }
    </style>
</head>
<div class="container ">
    <img src="images.jpeg" alt="小黄人" class="img-rounded">
    <img src="images.jpeg" alt="小黄人" class="img-circle">
    <img src="images.jpeg" alt="小黄人" class="img-thumbnail">
</div>
</body>
</html>